。任何UU编码行的长度都不应超过61个字符（字节），即它可以保持45个数据字节。当数据少于20个UU编码行时，校验和按照实际发送的字节数进行计算。主机将它与接收字节的校验和相比较。-. The length of any UU-encoded line should not exceed 61 characters (bytes), that it can hold 45 data bytes. When the data line less than 20 UU encoding, verification and the actual number of bytes sent to calculate. Host and receive it compared to the checksum byte.